Lecture Set 3

Question 1

What are the different types of bonds

Answer 1

Covalent = sharing of electrions
Polar= unequal sharing of electrons
Non-polar= equal sharing
Noncovalent
Ionic = electrostatic interactions
Hydrogen = electronegative atom and hydrogen covalently bound to a second EN atom
van der Waal’s = random transient dipoles, momentary random fluctuations in electron density
hydrophobic = aggregation to reduce ordering
NOT attraction between molecules,

Question 2

Why is it good that visible wavelength has a longer wavelength than C-C bonds?

Answer 2

Means lower energy than C-C, therefore the C-C bonds aren’t broken when visible light hits

Question 3

Difference between covalent/non-covalent?

Answer 3

Sharing of electrons

amount of energy to break bonds, stability

Question 4

Hydrogen bonding in water

Answer 4

surface tension
high specific heat capacity
high vaporization energy/boiling point
good polar solvent
every H2O molecule with 4 H-bonds = crystal lattice (ice)

Question 5

2 types of chaperones

Answer 5

Molecular chaperones = bind to unfolded/partially folded areas, prevent it from aggregating with other nonpolar sections of proteins
Chaperonins = directly involved with folding

Question 6

Define affinity

Answer 6

measurement of number/strength of all noncovalent interactions between 2 molecules